コード例 #1
0
static bool read_tile(openslide_t *osr,
                      cairo_t *cr,
                      struct _openslide_level *level,
                      int64_t tile_col, int64_t tile_row,
                      void *arg,
                      GError **err) {
  struct level *l = (struct level *) level;
  struct _openslide_tiff_level *tiffl = &l->tiffl;
  TIFF *tiff = arg;

  // tile size
  int64_t tw = tiffl->tile_w;
  int64_t th = tiffl->tile_h;

  // cache
  struct _openslide_cache_entry *cache_entry;
  uint32_t *tiledata = _openslide_cache_get(osr->cache,
                                            level, tile_col, tile_row,
                                            &cache_entry);
  if (!tiledata) {
    tiledata = g_slice_alloc(tw * th * 4);
    if (!_openslide_tiff_read_tile(tiffl, tiff,
                                   tiledata, tile_col, tile_row,
                                   err)) {
      g_slice_free1(tw * th * 4, tiledata);
      return false;
    }

    // clip, if necessary
    if (!_openslide_tiff_clip_tile(tiffl, tiledata,
                                   tile_col, tile_row,
                                   err)) {
      g_slice_free1(tw * th * 4, tiledata);
      return false;
    }

    // put it in the cache
    _openslide_cache_put(osr->cache, level, tile_col, tile_row,
                         tiledata, tw * th * 4,
                         &cache_entry);
  }

  // draw it
  cairo_surface_t *surface = cairo_image_surface_create_for_data((unsigned char *) tiledata,
                                                                 CAIRO_FORMAT_ARGB32,
                                                                 tw, th,
                                                                 tw * 4);
  cairo_set_source_surface(cr, surface, 0, 0);
  cairo_surface_destroy(surface);
  cairo_paint(cr);

  // done with the cache entry, release it
  _openslide_cache_entry_unref(cache_entry);

  return true;
}
コード例 #2
0
                      int64_t tile_col, int64_t tile_row,
                      void *tile G_GNUC_UNUSED,
                      void *arg,
                      GError **err) {
  struct level *l = (struct level *) level;
  struct _openslide_tiff_level *tiffl = &l->tiffl;
  TIFF *tiff = arg;

  // tile size
  int64_t tw = tiffl->tile_w;
  int64_t th = tiffl->tile_h;

  // cache
  struct _openslide_cache_entry *cache_entry;
  uint32_t *tiledata = _openslide_cache_get(osr->cache,
                                            level, tile_col, tile_row,
                                            &cache_entry);
  if (!tiledata) {
    tiledata = g_slice_alloc(tw * th * 4);
    if (!_openslide_tiff_read_tile(tiffl, tiff,
                                   tiledata, tile_col, tile_row,
                                   err)) {
      g_slice_free1(tw * th * 4, tiledata);
      return false;
    }

    // clip, if necessary
    if (!_openslide_tiff_clip_tile(tiffl, tiledata,
                                   tile_col, tile_row,
                                   err)) {
      g_slice_free1(tw * th * 4, tiledata);
コード例 #3
0
                      cairo_t *cr,
                      struct _openslide_level *level G_GNUC_UNUSED,
                      int64_t tile_col, int64_t tile_row,
                      void *arg,
                      GError **err) {
  struct read_tile_args *args = arg;
  struct _openslide_tiff_level *tiffl = &args->area->tiffl;

  // tile size
  int64_t tw = tiffl->tile_w;
  int64_t th = tiffl->tile_h;

  // cache
  struct _openslide_cache_entry *cache_entry;
  uint32_t *tiledata = _openslide_cache_get(osr->cache,
                                            args->area, tile_col, tile_row,
                                            &cache_entry);
  if (!tiledata) {
    tiledata = g_slice_alloc(tw * th * 4);
    if (!_openslide_tiff_read_tile(tiffl, args->tiff,
                                   tiledata, tile_col, tile_row,
                                   err)) {
      g_slice_free1(tw * th * 4, tiledata);
      return false;
    }

    // clip, if necessary
    if (!_openslide_tiff_clip_tile(tiffl, tiledata,
                                   tile_col, tile_row,
                                   err)) {
      g_slice_free1(tw * th * 4, tiledata);